Improvement in electro-magnetic apparatus



R'. SAYER.

mprovement in Electro-Magnetic Apparatus. No. 129,752.

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Patented luly 23, 1872.

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UNITED STATES PATENT OFFICE,

RUDOLF SAYER, OF NEW YORK, N.

IMPROVEMENT iN ELECTRO-MAGNETIC APPARATUS.

Specification forming part of Letters Patent No. 129,752, dated July 23, 1872.

Specication describinganew and Improved Electro-Magnetic Apparatus, invented by BU- DoLE SAYER, of the city, county, and State of New York.

Figure l represents an end elevation of my improved electro-magnetic apparatus. Fig. 2

. is a vertical longitudinal section of the same 'adjustable frame which can be set opposite any one of its steps, to thereby enlarge or diminish its vibrations. The interval of the electric shocks can be conveniently changed by means of the adjustable frame, which is further connected with an index showing the degree of motion allowed to the hammer. The invention also consists in a new swivel-post, which connects with the conductors from the magnetic coil and sleeve, and with the wires which connect with the patient or with the article to be acted upon. By turning this post the direction of the current through the lastnamed wires can be reversed, as said post has metal arms connecting with the branched ends of the conductors, respectively, in the desired manner. There is also a vibrating wire frame, whereby the primary current can be used alone whenever desired.

A in the drawing represents the bed-plate or base of my improved electro-magnetic apparatus. It is made of wood or equivalent material, and supported on legs or posts a a, or otherwise. B is the wire coil or core constituting the electro-magnet, and supported in a horizontal position above the bed A. It communicates, by a conductor, b, with the positive pole of the battery, and by another conductor, d, whose end is forked, with two pins, e e', or termini of said conductor d on the under side of the bed-plate, as shown in Fig. 3. C is an induction-coil sliding around the core B, and

connected with wires fg, which are forked at the ends and form the termini f f2 and g g2, respectively. D is the hammer or armature to be attracted by the core B when the same is magnetized. This hammer is made with steps, as shown, to be largest in the middle horizontally, and diminishing toward the ends up and downward. It is aiixed to a spring-holder, E, which projects upward from a metal arm, h. The spring E has the tendency to hold the hammer away from the core B, and withdraws it, consequently, whenever the current is interrupted. F is a vertically-adjustable frame sliding on posts t t', and gearing into pinions jj on an arbor, Z. When this arbor is turned, which can easily be done by means of a handwheel at its end, the frame f will be set more or less up or down. Arms m m project from the frame F in front and back of the hammer D, and at such distance apart that when they are in line with the thicker middle part of the hammer they hold it steady, not permitting any motion to it. But the further the arms are moved up or down from the thicker middle of the hammer the larger will be the degree of motion allowed the same, owing to the gradual reduction in its diameter. The arbor l has or may have a projecting pointer or indexhand, a, opposite the face of a fixed dial, o, to indicate on the dial the position of the arms m and the degree of motion allowed the hammer, which can be represented by gures on the dial. G is a screw fitted through a plate, p, which connects, by a conductor, r, with the negative pole of the battery, and by another conductor, s, with the forked ends of the same, or pins s1 s2. The end of the pin or screw Gr is opposite a metal block on the spring E for electric connection. The metal arms h, to which the spring E is secured, can be adjusted longitudinally on the bed A, to enable the hammer to be set nearer to or further away from the core B, to thereby regulate the transmitting power of the apparatus in accordance with that of the battery. H is a swivel-post fitted into the bed-plate A, in the manner indicated in Fig. 6, so that it can be conveniently turned therein. It has on its lower end projecting arms t t2 and u u2.

When these wires are putin metallic con nection with the arms u u2 they will only trans mit the secondary current from the induction coil C, and will reverse thedirection of the same,I

as the arms u u2 are .brought in contact, re-

spectively, either with the pins f1 g2 or with f2 g1. The post, it is evident, must, on its upper part, have four metallic sockets communicating in pairs with the arms t t2 and u u2. When the primary current is required, the wires conducting current to the person are connected with the arms t t2,while for the secondary current they are brought in connection with the arms u u2. A slight turn of the post H will suffice to reverse the direction of the current in either case. When the primary current is to be used alone the wires are connected with the arms t t2, and an arbor, I, carrying a wireframe, c, is swung so as to bring the frame v in connection with the arms u u2, as in Fig. 3, thereby establishing metallic connection between them, and forming a short circuit for the secondary current.

I am awareof the patentgranted to one Powell March 26, 1872, but consider the changes shown by me as improvements thereon.

purpose described.

RUDOLF SAYER.

Witnesses T. B.` MosHER, W. A. GRAHAM. 

